1PTHREAD_CONDATTR_GETCLOCK(3PP)OSIX Programmer's ManuPaTlHREAD_CONDATTR_GETCLOCK(3P)
2
6 This manual page is part of the POSIX Programmer's Manual. The Linux
7 implementation of this interface may differ (consult the corresponding
8 Linux manual page for details of Linux behavior), or the interface may
9 not be implemented on Linux.
10
13 pthread_condattr_getclock, pthread_condattr_setclock — get and set the
14 clock selection condition variable attribute
15
17 #include <pthread.h>
18 int pthread_condattr_getclock(const pthread_condattr_t *restrict attr,
20 clockid_t *restrict clock_id);
21 int pthread_condattr_setclock(pthread_condattr_t *attr,
22 clockid_t clock_id);
23
25 The pthread_condattr_getclock() function shall obtain the value of the
26 clock attribute from the attributes object referenced by attr.
27 The pthread_condattr_setclock() function shall set the clock attribute
29 in an initialized attributes object referenced by attr. If
30 pthread_condattr_setclock() is called with a clock_id argument that
31 refers to a CPU-time clock, the call shall fail.
32 The clock attribute is the clock ID of the clock that shall be used to
34 measure the timeout service of pthread_cond_timedwait(). The default
35 value of the clock attribute shall refer to the system clock.
36 The behavior is undefined if the value specified by the attr argument
38 to pthread_condattr_getclock() or pthread_condattr_setclock() does not
39 refer to an initialized condition variable attributes object.
40
42 If successful, the pthread_condattr_getclock() function shall return
43 zero and store the value of the clock attribute of attr into the object
44 referenced by the clock_id argument. Otherwise, an error number shall
45 be returned to indicate the error.
46 If successful, the pthread_condattr_setclock() function shall return
48 zero; otherwise, an error number shall be returned to indicate the
49 error.
50
52 The pthread_condattr_setclock() function may fail if:
53 EINVAL The value specified by clock_id does not refer to a known clock,
55 or is a CPU-time clock.
56 These functions shall not return an error code of [EINTR].
58 The following sections are informative.
60
62 None.
63
65 None.
66
68 If an implementation detects that the value specified by the attr argu‐
69 ment to pthread_condattr_getclock() or pthread_condattr_setclock() does
70 not refer to an initialized condition variable attributes object, it is
71 recommended that the function should fail and report an [EINVAL] error.
72
74 None.
75
77 pthread_cond_destroy(), pthread_cond_timedwait(), pthread_con‐
78 dattr_destroy(), pthread_condattr_getpshared(), pthread_create(),
79 pthread_mutex_destroy()
80 The Base Definitions volume of POSIX.1‐2008, <pthread.h>
82
84 Portions of this text are reprinted and reproduced in electronic form
85 from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
86 -- Portable Operating System Interface (POSIX), The Open Group Base
87 Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri‐
88 cal and Electronics Engineers, Inc and The Open Group. (This is
89 POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the
90 event of any discrepancy between this version and the original IEEE and
91 The Open Group Standard, the original IEEE and The Open Group Standard
92 is the referee document. The original Standard can be obtained online
93 at http://www.unix.org/online.html .
94 Any typographical or formatting errors that appear in this page are
96 most likely to have been introduced during the conversion of the source
97 files to man page format. To report such errors, see https://www.ker‐
98 nel.org/doc/man-pages/reporting_bugs.html .
99IEEE/The Open Group 2013 PTHREAD_CONDATTR_GETCLOCK(3P)